The match, which celebrated the second-tier club's centenary, saw its first goal just eight minutes in, when the Germany international guided home Raphael Guerreiro's low cross at the near post.

Dortmund, coming off a 2-0 defeat to Bayern Munich in the German Super Cup on Sunday, went 2-0 up seven minutes after the break thanks to help from an error by Sandhausen's Rick Wulle -- the goalkeeper...